More peculiar things that I noticed:
1) I made a mistake: the e-book is actually sold on the Superstring web site, not the Beamsplitter web site. However, that's... not better. Superstring is the publisher of your current game of the month, Acolyte, which just came out at the end of June. Promoting two products by the same company at the same time, especially when one is brand-new and the other appears to be a competing product, makes me think that you have some undisclosed connection to that company. Even moreso because:
2) The Twitter link at the bottom of your site links not to the Beamsplitter account, but to the account for some web design firm called Squarespace. What's your connection to that company? It seems that Superstring's web site is also running on Squarespace infrastructure, since pressing Escape on their website prompts me to log in to Squarespace.
3) Speaking of Twitter, why are you following 18,000 accounts? I don't do social media, but I still find that very weird.